Lionel Messi has signed an agreement worth more than $20 million to promote digital fan token company Socios.com.

Messi becomes the latest global sports personality to enter the crypto world, following Tom Brady and LeBron James. Messi's deal also comes amid a growing wave of tie-ups between crypto firms and football.

Messi will be involved in a publicity and promotion campaign for Socios in the build-up to the Qatar World Cup, which starts in November.

The "ambassador" deal for Messi does not include crypto payments and is a three-year agreement